Pressure
mH₂Otopsf
Convert metres of water column (mH₂O) to pounds-force per square foot (psf).
Factor1 mH₂O = 204.8161 psf
Converter
mH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
psf
Rendered to 6 significant figures.
Formula
Formula
psf = mH₂O × 204.8161
Multiply any value in metres of water column by 204.8161 to obtain the value in pounds-force per square foot.
Worked example
Convert 1 mH₂O to psf.
- 01Start with 1 mH₂O.
- 02Multiply by the conversion factor: 1 × 204.8161 = 204.816 psf.
Result1 mH₂O = 204.816 psf
Conversion table
| mH₂O | psf |
|---|---|
| 1 | 204.82 |
| 2 | 409.63 |
| 5 | 1024.1 |
| 10 | 2048.2 |
| 20 | 4096.3 |
| 50 | 10241 |
| 100 | 20482 |
| 200 | 40963 |
| 500 | 1.0241e+5 |
| 1000 | 2.0482e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mH₂O to psf?
1 mH₂O equals 204.8161 psf. To convert, multiply the value in metres of water column by 204.8161.
How do I convert 1 mH₂O to psf?
1 mH₂O = 204.816 psf. For any value, multiply by 204.8161.
How do I convert psf back to mH₂O?
Divide by the same factor — or equivalently, multiply by 0.004882428. So 1 psf = 0.00488243 mH₂O.
When would I need to convert metre of water column to pound-force per square foot?
Pressure conversions between mH₂O and psf are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).